Sweepstakes must be carefully planned to comply with local laws and curtail forms of entrant fraud and abuse. Before home computers were popular, a common method of entry was a mailed, plain 3" × 5" index card with the entrant's name and address. Massive computer-printed entries resulted in a new requirement that entries must be "hand-printed".[citation needed] Laser printers that can mimic ink pen writing are also a problem for sponsors. In most sweepstakes, entrants and their relatives must not be related to the sponsor or promoter.